Ali Shamkhani, long-time ally of Iran's supreme leader, has stepped down as the country's top security official, Iranian state media said on Monday.
An Iranian insider said the change in leadership at the Supreme National Security Council was unlikely to have an impact on its policies and that Shamkhani might be considered for a "more important position" in Iran.
He did not elaborate, but with a parliamentary election due in February - when analysts believe the turnout will be low amid mounting political dissent and growing economic hardships - such moves of senior personnel are being closely watched.
A Revolutionary Guards commander, Ali Akbar Ahmadian, has replaced Shamkhani, state media said, who served as chief of the Guards Joint Staff in the 2000s and later as head of its strategic center.
Active across the political spectrum in the country for decades, Shamkhani was appointed the secretary of the security council in 2013 and served as defense minister under two-term reformist president Mohammad Khatami from 1997 to 2005.
Born in Iran's oil-rich Khuzestan province in 1955, Shamkhani joined Iran's Guards shortly after its formation in 1979. He served as deputy commander of the Guards from 1981 to 1988.
